Skip to content

utils: handle ipv6 hosts when splitting URLs #10706

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
Closed

utils: handle ipv6 hosts when splitting URLs #10706

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 19 additions & 3 deletions src/flb_utils.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1154,7 +1154,7 @@ static char *flb_utils_copy_host_sds(const char *string, int pos_init, int pos_e
if (string[pos_end-1] != ']') {
return NULL;
}
return flb_sds_create_len(string + pos_init + 1, pos_end - 1);
return flb_sds_create_len(string + pos_init + 1, pos_end - 2);
Copy link

@ShelbyZ ShelbyZ Sep 9, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

for the casual reader, the change from -1 to -2 to remove the bracket from the new substring

}
else {
return flb_sds_create_len(string + pos_init, pos_end);
Expand All @@ -1171,6 +1171,7 @@ int flb_utils_url_split(const char *in_url, char **out_protocol,
char *p;
char *tmp;
char *sep;
char *bracket = NULL;

/* Protocol */
p = strstr(in_url, "://");
Expand All @@ -1192,7 +1193,14 @@ int flb_utils_url_split(const char *in_url, char **out_protocol,

/* Check for first '/' */
sep = strchr(p, '/');
tmp = strchr(p, ':');
if (p[0] == '[') {
bracket = strchr(p, ']');
}
if (bracket) {
tmp = strchr(bracket, ':');
} else {
tmp = strchr(p, ':');
}

/* Validate port separator is found before the first slash */
if (sep && tmp) {
Expand Down Expand Up @@ -1267,6 +1275,7 @@ int flb_utils_url_split_sds(const flb_sds_t in_url, flb_sds_t *out_protocol,
char *p = NULL;
char *tmp = NULL;
char *sep = NULL;
char *bracket = NULL;

/* Protocol */
p = strstr(in_url, "://");
Expand All @@ -1288,7 +1297,14 @@ int flb_utils_url_split_sds(const flb_sds_t in_url, flb_sds_t *out_protocol,

/* Check for first '/' */
sep = strchr(p, '/');
tmp = strchr(p, ':');
if (p[0] == '[') {
bracket = strchr(p, ']');
}
if (bracket) {
tmp = strchr(bracket, ':');
} else {
tmp = strchr(p, ':');
}

/* Validate port separator is found before the first slash */
if (sep && tmp) {
Expand Down
75 changes: 75 additions & 0 deletions tests/internal/aws_credentials_http.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -589,6 +589,80 @@ static void test_http_provider_eks_with_token_file()
cleanup_test(provider, config);
}

static void test_http_provider_eks_ipv6()
{
struct flb_aws_provider *provider;
struct flb_aws_credentials *creds;
struct flb_config *config;
int ret;

/* tests validation of valid ipv6 local loopback IP */
setenv("AWS_CONTAINER_CREDENTIALS_FULL_URI", "http://[fd00:ec2::23]/iam_credentials/pod1", 1);
setenv("AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE", TEST_AUTHORIZATION_TOKEN_FILE, 1);

setup_test(FLB_AWS_CLIENT_MOCK(
response(
expect(URI, "/iam_credentials/pod1"),
expect(METHOD, FLB_HTTP_GET),
expect(HEADER, "Authorization", "local-http-credential-server-authorization-token"),
set(STATUS, 200),
set(PAYLOAD, "{\n \"Code\" : \"Success\",\n \"LastUpdated\" : \"2021-09-16T18:29:09Z\",\n"
" \"Type\" : \"AWS-HMAC\",\n \"AccessKeyId\" : \"XACCESSEKSXXX\",\n \"SecretAccessKey\""
" : \"XSECRETEKSXXXXXXXXXXXXXX\",\n \"Token\" : \"XTOKENEKSXXXXXXXXXXXXXXX==\",\n"
" \"Expiration\" : \"3021-09-17T00:41:00Z\"\n}"),
set(PAYLOAD_SIZE, 257)
),
response(
expect(URI, "/iam_credentials/pod1"),
expect(METHOD, FLB_HTTP_GET),
expect(HEADER, "Authorization", "local-http-credential-server-authorization-token"),
set(STATUS, 200),
set(PAYLOAD, "{\n \"Code\" : \"Success\",\n \"LastUpdated\" : \"2021-09-16T18:29:09Z\",\n"
" \"Type\" : \"AWS-HMAC\",\n \"AccessKeyId\" : \"YACCESSEKSXXX\",\n \"SecretAccessKey\""
" : \"YSECRETEKSXXXXXXXXXXXXXX\",\n \"Token\" : \"YTOKENEKSXXXXXXXXXXXXXXX==\",\n"
" \"Expiration\" : \"3021-09-17T00:41:00Z\"\n}"),
set(PAYLOAD_SIZE, 257)
)
), &provider, &config);

flb_time_msleep(1000);

/* Repeated calls to get credentials should return the same set */
creds = provider->provider_vtable->get_credentials(provider);
TEST_ASSERT(creds != NULL);
TEST_CHECK(strcmp("XACCESSEKSXXX", creds->access_key_id) == 0);
TEST_CHECK(strcmp("XSECRETEKSXXXXXXXXXXXXXX", creds->secret_access_key) == 0);
TEST_CHECK(strcmp("XTOKENEKSXXXXXXXXXXXXXXX==", creds->session_token) == 0);

flb_aws_credentials_destroy(creds);

/* Retrieve from cache */
creds = provider->provider_vtable->get_credentials(provider);
TEST_ASSERT(creds != NULL);
TEST_CHECK(strcmp("XACCESSEKSXXX", creds->access_key_id) == 0);
TEST_CHECK(strcmp("XSECRETEKSXXXXXXXXXXXXXX", creds->secret_access_key) == 0);
TEST_CHECK(strcmp("XTOKENEKSXXXXXXXXXXXXXXX==", creds->session_token) == 0);

flb_aws_credentials_destroy(creds);

/* refresh should return 0 (success) */
ret = provider->provider_vtable->refresh(provider);
TEST_CHECK(ret == 0);

/* Retrieve refreshed credentials from cache */
creds = provider->provider_vtable->get_credentials(provider);
TEST_ASSERT(creds != NULL);
TEST_CHECK(strcmp("YACCESSEKSXXX", creds->access_key_id) == 0);
TEST_CHECK(strcmp("YSECRETEKSXXXXXXXXXXXXXX", creds->secret_access_key) == 0);
TEST_CHECK(strcmp("YTOKENEKSXXXXXXXXXXXXXXX==", creds->session_token) == 0);

flb_aws_credentials_destroy(creds);

/* Check we have exhausted our response list */
TEST_CHECK(flb_aws_client_mock_generator_count_unused_requests() == 0);

cleanup_test(provider, config);
}

static void test_http_provider_https_endpoint()
{
Expand Down Expand Up @@ -766,5 +840,6 @@ TEST_LIST = {
{ "test_http_provider_server_failure", test_http_provider_server_failure},
{ "test_http_validator_invalid_host", test_http_validator_invalid_host},
{ "test_http_validator_invalid_port", test_http_validator_invalid_port},
{ "test_http_provider_eks_ipv6", test_http_provider_eks_ipv6},
{ 0 }
};
2 changes: 2 additions & 0 deletions tests/internal/utils.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,8 @@ struct url_check url_checks[] = {
{0, "https://fluentbit.io:1234/", "https", "fluentbit.io", "1234", "/"},
{0, "https://fluentbit.io:1234/v", "https", "fluentbit.io", "1234", "/v"},
{-1, "://", NULL, NULL, NULL, NULL},
{0, "http://[fd00:ec2::23]/v1/credentials", "http", "fd00:ec2::23", "80", "/v1/credentials"},
{0, "https://[::192.9.5.5]:1234/v", "https", "::192.9.5.5", "1234", "/v"}
Copy link
Author

@danxmoran danxmoran Aug 7, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Self-review: I am not sure here if there will be a problem when actually trying to use the hosts because we stripped out the enclosing []s. The existing *_copy_host_* functions were stripping the brackets (or trying to) so I kept the behavior. Would appreciate a sanity-check!

Copy link

@ShelbyZ ShelbyZ Sep 9, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

They were trying to strip out the brackets but I suspect without -2 we would end up with URIs ending with ] and I expect those would have failed.

Copy link
Author

@danxmoran danxmoran Sep 9, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Agreed, I saw that failure mode before I switched it from -1 to -2

};

void test_url_split_sds()
Expand Down
Loading